311322212213 has 4 divisors (see below), whose sum is σ = 322057460940. Its totient is φ = 300586963488.

The previous prime is 311322212189. The next prime is 311322212231. The reversal of 311322212213 is 312212223113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63977125969 + 247345086244 = 252937^2 + 497338^2 .

It is a cyclic number.

It is not a de Polignac number, because 311322212213 - 2²² = 311318017909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311322212233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5367624320 + ... + 5367624377.

It is an arithmetic number, because the mean of its divisors is an integer number (80514365235).

Almost surely, 2^311322212213 is an apocalyptic number.

It is an amenable number.

311322212213 is a deficient number, since it is larger than the sum of its proper divisors (10735248727).

311322212213 is a wasteful number, since it uses less digits than its factorization.

311322212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10735248726.

The product of its digits is 864, while the sum is 23.

Adding to 311322212213 its reverse (312212223113), we get a palindrome (623534435326).

The spelling of 311322212213 in words is "three hundred eleven billion, three hundred twenty-two million, two hundred twelve thousand, two hundred thirteen".